GRAU & PUREZAMOS grade?MOS grade — high purity for metal-oxide-semiconductor processing. Use in MOS device fabrication sensitive to mobile-ion contamination.
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Application Protocols
Item-specific, validated protocols are not provided. The following is general, literature-based guidance for negative photoresist development. Optimize for your resist and process.
General negative PR development workflow (not item-specific)
Pre-bake and Coat: Apply negative resist per vendor SOP; softbake to remove solvent.
Exposure: Pattern with appropriate dose; consider focus/exposure matrix for CD tuning.
Post-Exposure Bake (PEB): Bake per datasheet to promote crosslinking; insufficient PEB leads to scumming/footing.
Develop:
Dispense method: Single-wafer puddle or spray; or immersion with mild agitation.
Temperature: 20–25 °C.
Time: Begin with vendor’s nominal (often 60–120 s puddle for thin films); adjust by open-frame clearing time.
Rinse: For aqueous developers, DI water 30–60 s. For organic developers, rinse in fresh developer or IPA as recommended.
Dry: Spin or N2 blow-dry; avoid water spots/solvent marks.
Inspect: Optical/SEM; check CDs, sidewalls, and residues. If residues persist, brief post-develop solvent rinse or megasonic DI (compatible substrates only) may help.
Controls and metrology
Include open-frame and focus-exposure matrices each run.
Track development rate and bath age; replace or refresh based on throughput or resist carryover.
Safety note
Execute in a fume hood or wet bench with appropriate PPE. Consult the SDS and resist datasheet for exact parameters.
Biological Roles
Not applicable. This product is an industrial/process chemical for microfabrication and has no inherent biological role.
Item-specific facts (from Product Data)
Research Use Note: For research use only.
General note
Any discussion of metabolism, signaling, or cellular roles is not relevant to photoresist developers. Avoid use in biological systems unless explicitly validated for that application and consistent with safety data.
Buffer Applications
Not typically applicable. Photoresist developers are process chemicals for microfabrication, not biological or analytical buffers.
Guidance
If pH control is required in a materials context (e.g., pre- or post-clean steps), use dedicated buffer systems specified for semiconductor processing. Do not substitute lithographic developers as laboratory buffers.
Green Alternatives
Item-specific composition is not disclosed; the following compares common developer chemistries from an environmental, health, and safety (EHS) perspective. Use this as general context, not as a statement about this product.
General/literature comparison (not item-specific)
Aqueous TMAH developers
Pros: Water-based, low VOC, excellent lithographic performance for many negative CARs.
Cons: Significant acute toxicity; corrosive; sensitivity to CO2; treatment requires neutralization and careful handling.
Choline hydroxide (CHOH) developers
Pros: Similar lithographic action to quaternary ammonium hydroxides with lower acute toxicity reported; water-based; biodegradable choline cation.
Cons: Process windows may differ; stability considerations; may require re-optimization of dose/PEB.
Carbonate/bicarbonate developers (Na2CO3/NaHCO3)
Pros: Benign inorganic bases; easy waste treatment; low toxicity; widely used for negative dry-film and some epoxy systems.
Cons: Narrower process latitude for some advanced resists; ionic residues if rinse is inadequate.
Organic solvent developers (e.g., PGMEA)
Pros: Essential for epoxy resists (SU-8); excellent selectivity.
If EHS is paramount, evaluate CHOH or carbonate systems for compatible resists. Implement developer recycling/filtration, closed-loop dispense to reduce VOCs, and DI-water cascade rinsing to cut water use. Validate lithographic metrics (CD, LER, DOF) when substituting chemistries.
Pharmaceutical Uses
Not applicable. This product is not an excipient or a pharmaceutical processing aid.
Notes
No pharmacopeial status is provided. Do not use in drug, diagnostic, or clinical applications. For research and materials processing only, as indicated in the Product Data.
Physical Properties
Item-specific properties are not provided for this product.
Item-specific facts (from Product Data)
Appearance: Not specified for this item; refer to CoA/Spec Sheet.
Molecular weight, molecular formula: Not specified (mixture/formulation likely)
General/literature values for common negative PR developer types (not item-specific)
Miscibility: Often limited with water; fully miscible with many aprotic organics
Optical characteristics: Developers are typically used for wet processing, not as optical media; UV cutoff/refractive index are usually not specified unless for lithography optics control.
Notes
Do not use literature values as specifications. Process windows (temperature, time, agitation) should be defined by the specific resist vendor and the CoA for this developer.
Quality and Grades
Item-specific quality metrics are not provided beyond the grade designation.
Item-specific facts (from Product Data)
Grade: MOS grade
Item-specific limits (metals, particulates, TOC, ionic content, UV absorbance): Not specified for this item; refer to CoA/Spec Sheet.
What MOS grade generally implies (general/literature; not item-specific)
MOS (Metal–Oxide–Semiconductor) grade chemicals are intended for semiconductor processing where contamination control is critical. Typical expectations include:
Ultra-low trace metal content (often sub-ppb levels for key ions like Na, K, Ca, Fe) to protect device performance and gate oxide integrity.
Low anionic/cationic contaminants to maintain predictable development rate and line-edge roughness (LER).
Particle control via filtration (e.g., ≤0.1–0.2 µm absolute) to minimize defects.
Low organic/TOC and extractables to reduce residue and scumming.
Batch-to-batch reproducibility of development rate and selectivity.
Stabilization/packaging practices (typical): Cleanroom-compatible packaging, nitrogen headspace for alkaline solutions to limit CO2 uptake, and pre-filtered product filled into low-extractable containers.
Practical notes
Verify compatibility with your specific negative resist and process window using the CoA: development rate (nm/s), selectivity, recommended temperature, and filtration rating. In the absence of item-specific specs, perform a small DoE to tune time/agitation.
Reaction and Applications
This product is used in lithographic development, not as a classical reagent for synthesis. Its role is to selectively dissolve non-crosslinked regions of a patterned negative photoresist film following exposure and post-exposure bake (PEB).
Item-specific facts (from Product Data)
Intended use: Negative PR development (materials science; research use only)
Specific compatible resists/processes: Not specified for this item; refer to CoA/Spec Sheet and resist vendor datasheets.
General/literature applications and mechanisms (not item-specific)
Chemically amplified negative resists: Photogenerated acid triggers crosslinking during PEB; aqueous alkaline developers remove unexposed, non-crosslinked regions via base-catalyzed dissolution/swelling.
Epoxy-based negative resists (e.g., SU-8): Crosslinking of epoxy groups during PEB produces a dense network; organic developers selectively dissolve uncrosslinked oligomers and residual casting solvent.
Use domains: MEMS, microfluidics, through-silicon vias, electroplating molds, micro-optics, and wafer-level packaging.
Practical development tips (general)
Control variables: Exposure dose, PEB temperature/time, developer normality/solvation strength, temperature (typically 20–25 °C), agitation, and rinse strategy. Small changes can strongly affect sidewall profile, critical dimension (CD), and LER.
Agitation: Gentle puddle or single-wafer spray improves transport without lifting crosslinked features.
Rinse: Immediate DI water (for aqueous systems) or isopropanol/PGMEA (for organic systems) minimizes scum and footing; dry with filtered N2.
Metrology: Use test patterns (open/isolated lines, meanders) to tune time-to-clear and ensure selectivity before running critical wafers.
Reaction Conditions
Development is a wet-processing step rather than a chemical synthesis reaction. Conditions should follow the resist vendor’s process recommendations.
Item-specific facts (from Product Data)
Specified temperature/time/concentration: Not specified for this item; refer to CoA/Spec Sheet.
General/literature guidance for negative PR development (not item-specific)
Temperature: 20–25 °C (room temperature) for most single-wafer or immersion processes; some processes use 18–22 °C for tighter control.
Time: Typically 30 s to 3 min puddle/spray for thin films; up to 5–10 min for thick or highly crosslinked films. Use end-point tests (open-frame clearing) when available.
Agitation: Gentle puddle rotation or spray; avoid excessive shear that can cause pattern lifting.
Post-exposure bake (PEB): Strongly determines crosslink density; higher PEB reduces development rate; optimize dose+PEB before tuning developer time.
Rinse: Immediate DI water (aqueous systems) or isopropanol/PGMEA (organic systems) for 30–60 s; N2 dry. Watch for "white blush" indicating incomplete solvent exchange.
Filtration: Use 0.2 µm or finer dispense filtration and particle-controlled baths to avoid defectivity (general semiconductor practice).
Materials compatibility: Validate on metal stacks; alkaline developers can attack Al/Cu without barriers; organic developers may swell polymers.
Expected outcomes (general)
Clear removal of unexposed resist with minimal footing or scumming; target CDs within tolerance and low LER. Adjust developer normality or time to correct under/over-development.
Safety and Handling
Item-specific hazard classification is not provided. Always consult the product’s SDS for authoritative guidance.
Item-specific facts (from Product Data)
GHS signal word, H-statements, pictograms, classification: Not specified for this item; refer to SDS.
Storage: Room temperature; shipped under normal conditions.
Research use only.
General/literature safety considerations for PR developers (not item-specific)
Aqueous alkaline developers (e.g., quaternary ammonium hydroxides, carbonates): Corrosive to skin/eyes; can cause severe burns. Some quaternary ammonium hydroxides (e.g., TMAH) exhibit significant systemic toxicity even at modest concentrations. Avoid skin contact; use double gloves, splash goggles/face shield, lab coat, and chemical apron for bench-scale handling.
Organic solvent developers (e.g., PGMEA, cyclohexanone, GBL): Flammable or combustible; cause eye/skin irritation; CNS effects from vapor exposure. Use in a fume hood; keep away from ignition sources; employ appropriate grounding/bonding during transfers.
Incompatibilities: Strong acids (neutralization/heat), active metals, oxidizers; for alkaline developers, avoid CO2 uptake that can shift activity. For organic developers, avoid strong bases/acids that can degrade resist or developer.
First aid (overview; consult SDS):
Skin/eyes: Immediate water flush 15+ min; remove contaminated clothing; seek medical attention for burns or persistent irritation.
Inhalation: Move to fresh air; monitor breathing; obtain medical assistance.
Ingestion: Do not induce vomiting; rinse mouth; seek urgent medical care.
Engineering controls: Chemical fume hood or wet bench with exhaust; splash shields for wafer processing; safety shower/eyewash accessible.
Waste: Collect separately as alkaline or solvent waste; do not mix with acids/oxidizers; follow institutional and local regulations.
Solvent Selection
This product functions as a process chemical (developer) rather than a general-purpose solvent. Selection focuses on resist compatibility, substrate interactions, and post-develop rinsing.
Item-specific facts (from Product Data)
Composition/solvent base: Not specified for this item; refer to CoA/Spec Sheet.
General/literature guidance (not item-specific)
Developer families
Aqueous alkaline (e.g., TMAH, carbonate): Highly polar, water-miscible; ideal for chemically amplified negative resists designed for base development. Rinse with DI water, optional IPA final rinse to aid drying.
Organic developers (e.g., PGMEA, GBL, cyclohexanone): Aprotic, medium-polar; designed for epoxy-based resists (e.g., SU-8) and some negative CARs. Rinse with fresh developer or with isopropanol/PGMEA per resist vendor guidance.
Substrate compatibility
Silicon, SiO2, Si3N4: Generally compatible.
Metals (Al, Cu, Ti): Aqueous alkali may attack certain metals or underlayers; consider barrier layers or organic developers when needed.
Polymers: Check for swelling/crazing with organic developers.
Process selection tips
Choose aqueous developers for processes prioritizing EHS and ease of rinse/dry; choose organic developers for epoxy resists or where aqueous alkalinity would damage underlying films.
Brief comparison (general)
Aqueous alkaline: Non-flammable, corrosive; easy DI rinse; sensitive to CO2.
Organic: Often flammable, better for epoxy resists; requires solvent-compatible waste handling.
Always confirm the resist vendor’s recommended developer and the developer’s CoA for best-match selection.
Storage and Reconstitution
Item-specific facts (from Product Data)
Storage conditions: Room temperature
Shipping: Normal
Concentration/ready-to-use status: Not specified for this item; refer to CoA/Spec Sheet.
General/literature guidance (not item-specific)
Shelf life: Follow CoA. For aqueous alkaline developers, minimize air/CO2 exposure to maintain activity; store tightly sealed. For organic developers, store in flammables-rated cabinets away from ignition sources.
Container compatibility: Use clean, low-extractable HDPE, PP, or fluoropolymer containers. Avoid soda-lime glass with strong bases due to potential leaching; amber containers can reduce light exposure for light-sensitive components.
Handling: Dispense through clean, filtered lines (e.g., 0.2 µm) to control particles. Label with receipt and first-open dates; track bath age if used in tanks.
Reconstitution/dilution: If supplied as a concentrate, dilute with high-purity DI water (≥18 MΩ·cm) for aqueous systems or specified anhydrous solvent for organic systems, per the Spec Sheet. Mix gently to avoid air entrainment; verify pH/normality or refractive index if applicable.
Stability: Avoid freezing or excessive heat. Protect from light when recommended by the CoA.
Compliance
For research use only. Refer to the CoA and SDS for definitive storage limits, shelf life, and any required stabilizers or inhibitors.
Structure and Identity
Item-specific identifiers for this product are not provided. The product is a formulated “Negative PR (photoresist) Developer,” typically used in microfabrication to remove unexposed regions of negative-tone resists after exposure and post-exposure bake.
Item-specific facts (from Product Data)
SKU: N1523730
Product name: Negative PR Developer
Grade: MOS grade (semiconductor processing)
Storage: Room temperature; shipped under normal conditions
CAS, InChIKey, SMILES, Molecular Formula, Molecular Weight: Not specified for this item; refer to CoA/Spec Sheet.
Negative photoresist developers are commonly either aqueous alkaline solutions (e.g., quaternary ammonium hydroxides such as TMAH; carbonate/bicarbonate systems) for chemically amplified resists, or organic solvent developers (e.g., PGMEA/GBL/cyclohexanone mixtures) for epoxy resists like SU-8.
As a “developer,” this material is typically a mixture and not a single defined molecule; thus, single-molecule structural identifiers (SMILES, InChIKey) may not apply.
Functional-role features: strong base activity (for aqueous systems) or selective solvation (for organic systems) to dissolve non-crosslinked resist domains while preserving crosslinked network regions.
2D structure (verbal)
Not applicable to a formulation. Developers are multicomponent liquids designed to selectively interact with photo-patterned polymer films rather than discrete molecular entities.
Synthetic Utility
Not a classical synthetic reagent. However, in research fabrication workflows, negative PR developers enable creation of micro- and nano-scale patterns that serve as templates or molds for subsequent material syntheses and device fabrication.
Item-specific facts (from Product Data)
Application: Negative photoresist development (materials science)
General/literature context (not item-specific)
Microfabrication-enabled synthesis
Electroplating molds: Developed negative resists define high-aspect-ratio cavities for Cu/Ni/Au electroforming.
Patterned catalysts: Resist openings permit selective deposition of metals/oxides, enabling site-specific growth (e.g., CVD, ALD through-resist approaches with compatible chemistries).
Microreactors: Channel patterns in glass/silicon/PDMS (via replica molding from resist masters) support small-scale synthesis with enhanced heat/mass transfer.
Practical implications
Developer strength/selectivity influences sidewall quality, which impacts downstream film conformality and mechanical integrity of plated structures.
Residue-free development reduces nucleation defects for subsequent thin-film steps.
Conclusion
While the developer is not a reagent for bond-forming chemistry, it is pivotal to the fidelity of lithographic templates used across a wide range of materials syntheses.
Target Specificity
Not applicable. This product is not a biological targeting reagent (e.g., antibody, probe). No antigen/epitope specificity applies.
Item-specific facts (from Product Data)
None provided.
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